Absorbent article including rear wing portions

Abstract

An absorbent article includes an elongate absorbent body and a pair of left and right rear wing portions disposed at longitudinal opposite left and right sides of the absorbent body in a rear zone thereof. Each of the rear wing portions includes a liquid-retentive wing absorbent core. Furthermore, an absorbent article includes an elongate absorbent body and a pair of left and right wing portions disposed at longitudinal opposite left and right sides of the absorbent body. Each of the wing portions includes a laminated sheet formed by laminating at least two sheet materials and the two sheets of material are bonded to and along opposite side edges of the absorbent body with an adhesive agent except for non-coated linear areas of a predetermined width formed on the wing portions.

1. A sanitary napkin comprising an elongate absorbent body and a pair of left and right rear wing portions disposed at longitudinal opposite left and right sides of said absorbent body in a rear zone thereof, wherein each of said rear wing portions includes a liquid-retentive wing portion absorbent core between a liquid permeable sheet and a liquid impermeable sheet, said left and right rear wing portions located at the rear side of the wearer when worn, said left and right wear wing portions being asymmetrical with regard to a center line which divides the longitudinal length of the absorbent body into halves, and back surfaces of each of said absorbent body and rear wing portions provided with a body adhesive area, and rear wing adhesive area, respectively,
 wherein each of the wing portion absorbent cores comprises a dry type pulp sheet having reduced liquid dispersibility, 
 wherein there is no step between the back surface of the absorbent body and the back surface of the rear wing portions, 
 wherein said absorbent body includes a liquid-retentive body absorbent core, and wherein said body absorbent core and said wing portion absorbent core are isolated from each other through a liquid permeable isolating member, and 
 wherein the hardness of each of the wing portion absorbent cores is 20 to 500 g in terms of buckling strength. 
 
     
     
       2. A sanitary napkin according to  claim 1 , wherein said wing portion absorbent core is 80 cm 2  or less in absorptive area after 1 minute after dropping of 1 g of a physiological solution of sodium chloride. 
     
     
       3. A sanitary napkin according to  claim 1 , wherein said wing portion absorbent core is 20 to 500 g in buckling strength. 
     
     
       4. A sanitary napkin comprising an elongate absorbent body and a pair of left and right wing portions disposed at longitudinal opposite left and right sides of said absorbent body, wherein each of said wing portions includes a liquid-retentive absorbent core and is formed by laminating at least two sheet materials and said two sheet materials are bonded through an adhesive agent only excluding adhesive agent non-coated areas of a predetermined width formed on said wing portions along opposite side edges of said absorbent body, said left and right rear wing portions located at the rear side of the wearer when worn, said left and right rear wing portions being asymmetrical with regard to a center line which divides the longitudinal length of the absorbent body into halves, and back surfaces of each of said absorbent body and rear wing portions provided with a body adhesive area, and rear wing adhesive area, respectively,
 wherein each of the wing portion absorbent cores comprises a dry type pulp sheet having reduced liquid dispersibility, 
 wherein there is no step between the back surface of the absorbent body and the back surface of the rear wing portions, 
 wherein said absorbent body includes a liquid-retentive body absorbent core, and wherein said body absorbent core and said wing portion absorbent core are isolated from each other through a liquid permeable isolating member, and 
 wherein the hardness of each of the wing portion absorbent cores is 20 to 500 g in terms of buckling strength. 
 
     
     
       5. A sanitary napkin according to  claim 4 , wherein said two sheet materials are an antileakage sheet and an absorptive sheet placed on said antileakage sheet. 
     
     
       6. A sanitary napkin according to  claim 5 , wherein said absorptive sheet is provided on an upper surface side thereof with a liquid-permeable sheet in such a manner as to cover said absorptive sheet. 
     
     
       7. A sanitary napkin according to  claim 4 , wherein said wing portion comprises a pair of left and right front wing portions disposed at longitudinal opposite left and right sides of said absorbent body on the side of a front zone thereof and a pair of left and right rear wing portions disposed at longitudinal opposite left and right sides of said absorbent body on the side of a rear zone thereof. 
     
     
       8. A sanitary napkin according to  claim 5 , wherein said wing portion comprises a pair of left and right front wing portions disposed at longitudinal opposite left and right sides of said absorbent body on the side of a front zone thereof and a pair of left and right rear wing portions disposed at longitudinal opposite left and right sides of said absorbent body on the side of a rear zone thereof. 
     
     
       9. A sanitary napkin according to  claim 6 , wherein said wing portion comprises a pair of left and right front wing portions disposed at longitudinal opposite left and right sides of said absorbent body on the side of a front zone thereof and a pair of left and right rear wing portions disposed at longitudinal opposite left and right sides of said absorbent body on the side of a rear zone thereof. 
     
     
       10. A sanitary napkin according to  claim 7 , wherein said sanitary napkin comprises an elongate upper layer portion comprised of a body absorbent core and a liquid-permeable topsheet disposed in such a manner as to cover upper and side surfaces of said body absorbent core; and a lower layer portion comprised of a liquid-impermeable antileakage sheet, a liquid-permeable sheet having a generally same configuration as said antileakage sheet and an absorptive sheet interposed between said liquid-impermeable antileakage sheet and said liquid-permeable sheet, said lower layer portion being enlarged in width dimension on the side of the front zone and the rear zone,
 said upper layer portion being placed on said liquid-permeable sheet of said lower layer portion such that the longitudinal opposite side portions of said lower layer portion, which are enlarged in width dimension, may extend from a longitudinal side edge of said upper layer portion, and, 
 said front and rear wing portions being formed of said extended lower layer portion. 
 
     
     
       11. A sanitary napkin according to  claim 8 , wherein said sanitary napkin comprises an elongate upper layer portion comprised of a body absorbent core and a liquid-permeable topsheet disposed in such a manner as to cover upper and side surfaces of said body absorbent core; and a lower layer portion comprised of a liquid-impermeable antileakage sheet, a liquid-permeable sheet having a generally same configuration as said antileakage sheet and an absorptive sheet interposed between said liquid-impermeable antileakage sheet and said liquid-permeable sheet, said lower layer portion being enlarged in width dimension on the side of the front zone and the rear zone,
 said upper layer portion being placed on said liquid-permeable sheet of said lower layer portion such that the longitudinal opposite side portions of said lower layer portion, which are enlarged in width dimension, may extend from a longitudinal side edge of said upper layer portion, and, 
 said front and rear wing portions being formed of said extended lower layer portion. 
 
     
     
       12. A sanitary napkin according to  claim 9 , wherein said sanitary napkin comprises an elongate upper layer portion comprised of a body absorbent core and a liquid-permeable topsheet disposed in such a manner as to cover upper and side surfaces of said body absorbent core; and a lower layer portion comprised of a liquid-impermeable antileakage sheet, a liquid-permeable sheet having a generally same configuration as said antileakage sheet and an absorptive sheet interposed between said liquid-impermeable antileakage sheet and said liquid-permeable sheet, said lower layer portion being enlarged in width dimension on the side of the front zone and the rear zone,
 said upper layer portion being placed on said liquid-permeable sheet of said lower layer portion such that the longitudinal opposite side portions of said lower layer portion, which are enlarged in width dimension, may extend from a longitudinal side edge of said upper layer portion, and, 
 said front and rear wing portions being formed of said extended lower layer portion. 
 
     
     
       13. The sanitary napkin according to  claim 1 , wherein the thickness of each wing portion absorbent core is from 0.2 to 3 mm. 
     
     
       14. The sanitary napkin according to  claim 1 , wherein the thickness of each wing portion absorbent core is smaller than the thickness of said absorbent body.